Tech. Series 22, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate II. 



-28 



35 ^ 



\ 



Structure of Dipterous Larv/e. 



Fig. 17.— il/MseJna slabulans: Stigmal i)l;ites. Fig. \s,.— Muscina stabulans: Tip of body, side view. 

 Fig. VX— Muscina stahulnns: End of body. Fig. •20.— Muscina assimilis: 'J'ip of bodv, side view. 

 F'ig. 21.— Muscina asximilis: Stignuil plates. Fig. 22.— Muscina nxH'wilix: End of body. Fig. 23.— Near 

 Muscina: Last two segments. Fig. 24.— Near Muncina: Anterior spiracle. Fig. 25.— Near i\fuscinn: 

 Head, above. Fig. 2(;.— Near Muscina: Stignial plate. Fig. 27.— Muscina slabulans.- Head, side view. 

 Fig. 2S.— Muscina slabulans: Anterior spiracle. Fig. 29.— Miiscid C: Tip of body, side view. Fig. 30.— 

 Miiscid C: Stigmal plates. Fig. 31.— Mu.scid C: Anterior spiracle. Fig. 32.— Miiscid C: End of body. 

 Fig. 33.— Mu.scid A: Tip of bodv, side view. Fig. 34.— Miiscid D: End of bo<ly. F'ig. 3o.-Miiscid I): 

 Anterior spiracle. Fig. Zi<.— Muscina slabulans: Head, above. F'ig. 37.— Muscid A: Stigmal plate. 

 Fig. 38.— Muscid ^ .• Anterior spiracle. Enlarged. (Original.) 



